Move to meson build configuration

cmake is Deprecated

Signed-off-by: John Chung <john.chung@arm.com>
Change-Id: I9d08b087828aa5a16f601785dcb7868704ec73a3
diff --git a/subprojects/libb64.wrap b/subprojects/libb64.wrap
new file mode 100644
index 0000000..3797ca7
--- /dev/null
+++ b/subprojects/libb64.wrap
@@ -0,0 +1,6 @@
+[wrap-git]
+url = https://github.com/aklomp/base64
+revision = 8bdda2d47caf8b066999c5bd01069e55bcd0d396
+
+[provide]
+libb64 = libb64_dep