add SYS_PTRACE capability (#9 #212)
add SYS_PTRACE capability (#9 #212)

I'm finding that with e.g.

python infra/helper.py build_fuzzers libpng

all builds fail for me with...

configure:3443: checking whether we are cross compiling
configure:3451: clang -o conftest -g -fsanitize=address -fsanitize-coverage=edge,indirect-calls,8bit-counters   conftest.c  >&5
configure:3455: $? = 0
configure:3462: ./conftest
==1014==LeakSanitizer has encountered a fatal error.
==1014==HINT: For debugging, try setting environment variable LSAN_OPTIONS=verbosity=1:log_threads=1
==1014==HINT: LeakSanitizer does not work under ptrace (strace, gdb, etc)
configure:3466: $? = 1
configure:3473: error: in `/src/libpng':
configure:3475: error: cannot run C compiled programs.

with the defaults of...
CC=clang
CXX=clang++
CFLAGS=-g -fsanitize=address -fsanitize-coverage=edge,indirect-calls,8bit-counters
CXXFLAGS=-g -fsanitize=address -fsanitize-coverage=edge,indirect-calls,8bit-counters -stdlib=libc++

but adding --cap-add SYS_PTRACE makes it work
oliverchang/oss-fuzz,oliverchang/oss-fuzz,FeliciaLim/oss-fuzz,ssbr/oss-fuzz,oliverchang/oss-fuzz,skia-dev/oss-fuzz,robertswiecki/oss-fuzz,google/oss-fuzz,googlefonts/oss-fuzz,FeliciaLim/oss-fuzz,google/oss-fuzz,googlefonts/oss-fuzz,kcc/oss-fuzz,robertswiecki/oss-fuzz,robertswiecki/oss-fuzz,oliverchang/oss-fuzz,ssbr/oss-fuzz,google/oss-fuzz,google/oss-fuzz,vitalybuka/oss-fuzz,googlefonts/oss-fuzz,FeliciaLim/oss-fuzz,googlefonts/oss-fuzz,skia-dev/oss-fuzz,robertswiecki/oss-fuzz,googlefonts/oss-fuzz,google/oss-fuzz,vitalybuka/oss-fuzz,skia-dev/oss-fuzz,robertswiecki/oss-fuzz,skia-dev/oss-fuzz,googlefonts/oss-fuzz,skia-dev/oss-fuzz,robertswiecki/oss-fuzz,google/oss-fuzz,vitalybuka/oss-fuzz,googlefonts/oss-fuzz,ssbr/oss-fuzz,ssbr/oss-fuzz,googlefonts/oss-fuzz,skia-dev/oss-fuzz,ssbr/oss-fuzz,google/oss-fuzz,kcc/oss-fuzz,skia-dev/oss-fuzz,google/oss-fuzz,kcc/oss-fuzz,robertswiecki/oss-fuzz,robertswiecki/oss-fuzz,FeliciaLim/oss-fuzz,google/oss-fuzz,kcc/oss-fuzz,vitalybuka/oss-fuzz,skia-dev/oss-fuzz,oliverchang/oss-fuzz,google/oss-fuzz,googlefonts/oss-fuzz,skia-dev/oss-fuzz,FeliciaLim/oss-fuzz,google/oss-fuzz,robertswiecki/oss-fuzz,robertswiecki/oss-fuzz,robertswiecki/oss-fuzz,kcc/oss-fuzz,vitalybuka/oss-fuzz,skia-dev/oss-fuzz,googlefonts/oss-fuzz,skia-dev/oss-fuzz