Usr/local/include not included in build includes

[bferguson3]

harfbuzz installs by default to /usr/local/include/harfbuzz. I had to manually copy harfbuzz source to /usr/include/harfbuzz to get skia to build.

ben@benpi-desktop:~/deps/skia$ find / -name "hb.h" 2>/dev/null
/usr/local/include/harfbuzz/hb.h
/home/ben/Projects/aseprite/third_party/harfbuzz/src/hb.h
/home/ben/deps/skia/third_party/externals/harfbuzz/src/hb.h
/home/ben/deps/harfbuzz/src/hb.h

[1/422] compile ../../modules/skshaper/src/SkShaper_harfbuzz.cpp
FAILED: obj/modules/skshaper/src/libskshaper.SkShaper_harfbuzz.o 
g++ -MD -MF obj/modules/skshaper/src/libskshaper.SkShaper_harfbuzz.o.d -DSKSHAPER_IMPLEMENTATION=1 -DNDEBUG -DSK_GAMMA_APPLY_TO_A8 -DSK_SHAPER_HARFBUZZ_AVAILABLE -DSK_GL -DSK_SUPPORT_PDF -DSK_HAS_JPEG_LIBRARY -DSK_USE_LIBGIFCODEC -DSK_HAS_PNG_LIBRARY -DSK_CODEC_DECODES_RAW -DSK_HAS_WEBP_LIBRARY -DSK_XML -DSK_R32_SHIFT=16 -DU_USING_ICU_NAMESPACE=0 -DSK_USING_THIRD_PARTY_ICU -I../../modules/skshaper/include -I../.. -I../../third_party/externals/libgifcodec -I/usr/include/harfbuzz -fstrict-aliasing -fPIC -O3 -fdata-sections -ffunction-sections -Wno-unused-parameter -I /home/ben/deps/skia/third_party/externals/icu/source/common -I /home/ben/deps/skia/third_party/externals/icu/source/i18n -I /home/ben/deps/skia/third_party/icu -std=c++17 -fno-exceptions -fno-rtti -c ../../modules/skshaper/src/SkShaper_harfbuzz.cpp -o obj/modules/skshaper/src/libskshaper.SkShaper_harfbuzz.o
../../modules/skshaper/src/SkShaper_harfbuzz.cpp:32:10: fatal error: hb.h: No such file or directory
   32 | #include <hb.h>
      |          ^~~~~~
compilation terminated.