Update libgit2 to build with GIT_TRACE

Build libgit2 with tracing information so that we can provide it to
consumers.

Author: Edward Thomson

UpdateLibgit2ToSha.ps1

@@ -144,7 +144,7 @@ function Assert-Consistent-Naming($expected, $path) {
 	Run-Command -Quiet { & remove-item build -recurse -force }
 	Run-Command -Quiet { & mkdir build }
 	cd build
-	Run-Command -Quiet -Fatal { & $cmake -G "Visual Studio $vs" -D THREADSAFE=ON -D "BUILD_CLAR=$build_clar" -D "LIBGIT2_FILENAME=$binaryFilename" -DSTDCALL=ON .. }
+	Run-Command -Quiet -Fatal { & $cmake -G "Visual Studio $vs" -D THREADSAFE=ON -D ENABLE_TRACE=ON -D "BUILD_CLAR=$build_clar" -D "LIBGIT2_FILENAME=$binaryFilename" -DSTDCALL=ON .. }
 	Run-Command -Quiet -Fatal { & $cmake --build . --config $configuration }
 	if ($test.IsPresent) { Run-Command -Quiet -Fatal { & $ctest -V . } }
 	cd $configuration
@@ -157,7 +157,7 @@ function Assert-Consistent-Naming($expected, $path) {
 	cd ..
 	Run-Command -Quiet { & mkdir build64 }
 	cd build64
-	Run-Command -Quiet -Fatal { & $cmake -G "Visual Studio $vs Win64" -D THREADSAFE=ON -D "BUILD_CLAR=$build_clar" -D "LIBGIT2_FILENAME=$binaryFilename" -DSTDCALL=ON ../.. }
+	Run-Command -Quiet -Fatal { & $cmake -G "Visual Studio $vs Win64" -D THREADSAFE=ON -D ENABLE_TRACE=ON -D "BUILD_CLAR=$build_clar" -D "LIBGIT2_FILENAME=$binaryFilename" -DSTDCALL=ON ../.. }
 	Run-Command -Quiet -Fatal { & $cmake --build . --config $configuration }
 	if ($test.IsPresent) { Run-Command -Quiet -Fatal { & $ctest -V . } }
 	cd $configuration

build.libgit2sharp.sh

@@ -12,6 +12,7 @@ cmake -DCMAKE_BUILD_TYPE:STRING=RelWithDebInfo \
       -DTHREADSAFE:BOOL=ON \
       -DBUILD_CLAR:BOOL=OFF \
       -DUSE_SSH=OFF \
+      -DENABLE_TRACE=ON \
       -DLIBGIT2_FILENAME=git2-$SHORTSHA \
       -DCMAKE_OSX_ARCHITECTURES="i386;x86_64" \
       ..