build: enable subproject-based build

* Move existing phosphor-logging.wrap to the subprojects directory.
* Add wrap files for all openbmc dependencies.
* Fix up meson.build files to utilize subproject dependencies and follow
  Meson conventions for dependency naming.
* Ensure wrap files are not ignored by .gitignore.

Tested: Built on a typical Linux development system and 'ninja test'
        passed.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I167911f045ee1f27cc69bcba7be185762844a030
diff --git a/.gitignore b/.gitignore
index 44bbe67..d7a8fcb 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,7 @@
 ### Meson ###
 # subproject directories
 /subprojects/*
+!/subprojects/*.wrap
 
 # build directory
 build*/*
diff --git a/src/erase/meson.build b/src/erase/meson.build
index 14e4668..d5be948 100644
--- a/src/erase/meson.build
+++ b/src/erase/meson.build
@@ -8,8 +8,9 @@
   include_directories : eStoraged_headers,
   implicit_include_directories: false,
   dependencies: [
-    dependency('phosphor-dbus-interfaces'),
-    dependency('stdplus'),
+    phosphor_dbus_interfaces_dep,
+    phosphor_logging_dep,
+    stdplus_dep,
   ],
 )
 
diff --git a/src/meson.build b/src/meson.build
index a85b3bc..4bb75a2 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -1,16 +1,17 @@
+phosphor_dbus_interfaces_dep = dependency('phosphor-dbus-interfaces')
+phosphor_logging_dep = dependency('phosphor-logging')
+sdbusplus_dep = dependency('sdbusplus')
+stdplus_dep = dependency('stdplus')
 
 subdir('erase')
 
 libeStoraged_deps = [
-  dependency('sdbusplus'),
-  dependency('phosphor-logging',
-    fallback: ['phosphor-logging',
-               'phosphor_logging_dep'],
-    ),
-  dependency('openssl'),
   dependency('libcryptsetup'),
-  dependency('stdplus'),
-  dependency('phosphor-dbus-interfaces'),
+  dependency('openssl'),
+  phosphor_dbus_interfaces_dep,
+  phosphor_logging_dep,
+  sdbusplus_dep,
+  stdplus_dep,
 ]
 
 libeStoraged_lib = static_library(
diff --git a/subprojects/phosphor-dbus-interfaces.wrap b/subprojects/phosphor-dbus-interfaces.wrap
new file mode 100644
index 0000000..346aa0c
--- /dev/null
+++ b/subprojects/phosphor-dbus-interfaces.wrap
@@ -0,0 +1,6 @@
+[wrap-git]
+url = https://github.com/openbmc/phosphor-dbus-interfaces.git
+revision = HEAD
+
+[provide]
+phosphor-dbus-interfaces = phosphor_dbus_interfaces_dep
diff --git a/phosphor-logging.wrap b/subprojects/phosphor-logging.wrap
similarity index 61%
rename from phosphor-logging.wrap
rename to subprojects/phosphor-logging.wrap
index a039fcf..71eee8b 100644
--- a/phosphor-logging.wrap
+++ b/subprojects/phosphor-logging.wrap
@@ -1,3 +1,6 @@
 [wrap-git]
 url = https://github.com/openbmc/phosphor-logging.git
 revision = HEAD
+
+[provide]
+phosphor-logging = phosphor_logging_dep
diff --git a/subprojects/sdbusplus.wrap b/subprojects/sdbusplus.wrap
new file mode 100644
index 0000000..7b076d0
--- /dev/null
+++ b/subprojects/sdbusplus.wrap
@@ -0,0 +1,6 @@
+[wrap-git]
+url = https://github.com/openbmc/sdbusplus.git
+revision = HEAD
+
+[provide]
+sdbusplus = sdbusplus_dep
diff --git a/subprojects/stdplus.wrap b/subprojects/stdplus.wrap
new file mode 100644
index 0000000..765ba71
--- /dev/null
+++ b/subprojects/stdplus.wrap
@@ -0,0 +1,6 @@
+[wrap-git]
+url = https://github.com/openbmc/stdplus
+revision = HEAD
+
+[provide]
+stdplus = stdplus_dep