fix: Add *_all.cc files to ignore list

Added [gmock|gtest]_all.cc to PIO ignore list to avoid getting duplicate
symbols since PIO will compile the individual files.

library.json

@@ -27,6 +27,7 @@
             "googlemock/make",
             "googlemock/msvc",
             "googlemock/scripts",
+            "googlemock/src/gmock_all.cc",
             "googlemock/src/gmock_main.cc",
             "googlemock/test",
             "googlemock/CMakeLists.txt",
@@ -38,6 +39,7 @@
             "googletest/make",
             "googletest/msvc",
             "googletest/scripts",
+            "googletest/src/gtest_all.cc",
             "googletest/src/gtest_main.cc",
             "googletest/test",
             "googletest/xcode",