Reorganize gtest

Currently, gtest is included as a source library.  This means that every
test application compiles its own version of gtest.  This is wasteful,
even though it's likely not that expensive compared to other compile
time things.

Move gtest into a library, upgrade our version of gtest at the same
time.

Tested: unit tests pass

Change-Id: I5064848bd42d6b119a8d4aa9bcac13ad8ec65955
Signed-off-by: Ed Tanous <etanous@nvidia.com>
diff --git a/subprojects/gtest.wrap b/subprojects/gtest.wrap
index 8c067ff..2261ea3 100644
--- a/subprojects/gtest.wrap
+++ b/subprojects/gtest.wrap
@@ -1,16 +1,17 @@
 [wrap-file]
-directory = googletest-1.14.0
-source_url = https://github.com/google/googletest/archive/refs/tags/v1.14.0.tar.gz
-source_filename = gtest-1.14.0.tar.gz
-source_hash = 8ad598c73ad796e0d8280b082cebd82a630d73e73cd3c70057938a6501bba5d7
-patch_filename = gtest_1.14.0-1_patch.zip
-patch_url = https://wrapdb.mesonbuild.com/v2/gtest_1.14.0-1/get_patch
-patch_hash = 2e693c7d3f9370a7aa6dac802bada0874d3198ad4cfdf75647b818f691182b50
-source_fallback_url = https://github.com/mesonbuild/wrapdb/releases/download/gtest_1.14.0-1/gtest-1.14.0.tar.gz
-wrapdb_version = 1.14.0-1
+directory = googletest-1.15.0
+source_url = https://github.com/google/googletest/archive/refs/tags/v1.15.0.tar.gz
+source_filename = gtest-1.15.0.tar.gz
+source_hash = 7315acb6bf10e99f332c8a43f00d5fbb1ee6ca48c52f6b936991b216c586aaad
+patch_filename = gtest_1.15.0-1_patch.zip
+patch_url = https://wrapdb.mesonbuild.com/v2/gtest_1.15.0-1/get_patch
+patch_hash = 5f8e484c48fdc1029c7fd08807bd2615f8c9d16f90df6d81984f4f292752c925
+source_fallback_url = https://github.com/mesonbuild/wrapdb/releases/download/gtest_1.15.0-1/gtest-1.15.0.tar.gz
+wrapdb_version = 1.15.0-1
 
 [provide]
 gtest = gtest_dep
 gtest_main = gtest_main_dep
 gmock = gmock_dep
 gmock_main = gmock_main_dep
+