Merge #19861: build: add /usr/local/ to LCOV_FILTER_PATTERN for macOS builds

9bdde3c build: add /usr/local/ to LCOV_FILTER_PATTERN for macOS builds (eugene)

Pull request description:

  With this commit, the files in /usr/local/ will not be included in
  `make cov` or `make cov_fuzz` coverage reports. This behavior could
  be observed when generating the reports on macOS with brew-installed
  clang.

ACKs for top commit:
  fanquake:
    ACK 9bdde3c

Tree-SHA512: 15cbe8d514651448f3d7b8b0a00939fd6bd6f15e6812f1959fcaaab7364ca2ef4ee34f2ff8950b7fdc8ae64d043dc5f7185c0601dd94780b41331337e5e84c45

Author: fanquake

Makefile.am

@@ -181,6 +181,7 @@ $(BITCOIN_WALLET_BIN): FORCE
 
 if USE_LCOV
 LCOV_FILTER_PATTERN = \
+	-p "/usr/local/" \
 	-p "/usr/include/" \
 	-p "/usr/lib/" \
 	-p "/usr/lib64/" \