Fix compiler detection for avr-gcc with -std=gnu99

Jack

2017-02-21 fb2ee796938f75527571252128a306ba7658871a

 .travis.yml

@@ -24,7 +24,13 @@
script:
  - make
  - CC=clang CFLAGS="-g -O0 -fsanitize=address" LDFLAGS="-g -fsanitize=address" make clean test
  - CC=clang CFLAGS="-g -O0 -fsanitize=address -DUSE_DEVICE_DEPENDENT_ERROR_INFORMATION=0" LDFLAGS="-g -fsanitize=address" make clean test
  - CC=clang CFLAGS="-g -O0 -fsanitize=address -DUSE_MEMORY_ALLOCATION_FREE=0" LDFLAGS="-g -fsanitize=address" make clean test
  - CFLAGS="-m32" LDFLAGS="-m32 -L$PWD/CUnit/CUnit/Sources/.libs/" make clean test
  - CFLAGS="-m32 -std=c89" LDFLAGS="-m32 -L$PWD/CUnit/CUnit/Sources/.libs/" make clean test
  - CFLAGS="-m32 -std=c90" LDFLAGS="-m32 -L$PWD/CUnit/CUnit/Sources/.libs/" make clean test
  - CFLAGS="-m32 -std=c99" LDFLAGS="-m32 -L$PWD/CUnit/CUnit/Sources/.libs/" make clean test
  - CFLAGS="-m32 -std=gnu99" LDFLAGS="-m32 -L$PWD/CUnit/CUnit/Sources/.libs/" make clean test
  - LDFLAGS="-lgcov" CFLAGS="-fprofile-arcs -ftest-coverage" make clean all test

after_success: