gtest: Make library shared

run/gtest-samples.run

@@ -57,7 +57,7 @@ build_boot_image {
 	core init ld.lib.so
 	timer
 	libc.lib.so vfs.lib.so libm.lib.so posix.lib.so stdcxx.lib.so
-	gtest-samples
+	gtest.lib.so gtest-samples
 }
 
 append qemu_args " -nographic "

run/gtest.run

@@ -65,7 +65,7 @@ build_boot_image {
 	core init ld.lib.so
 	timer ram_fs
 	libc.lib.so vfs.lib.so libm.lib.so posix.lib.so stdcxx.lib.so
-	gtest
+	gtest.lib.so gtest
 }
 
 append qemu_args " -nographic "