[build] mini_al fails to compile on macOS El Capitan CI (CLOCK_MONOTONIC undefined)

[a3f]

homebrew's jenkins CI reported breakage on macOS El Capitan with v.1.9.4-dev (works for me though, but on High Sierra):

https://jenkins.brew.sh/job/Homebrew%20Core%20Pull%20Requests/18901/version=el_capitan/testReport/brew-test-bot/el_capitan/install_raylib/

[ 79%] Building C object release/CMakeFiles/raylib.dir/external/mini_al.c.o
cd /tmp/raylib-20180220-6462-ihgvj8/raylib-1.9.4-dev/release && /usr/local/Homebrew/Library/Homebrew/shims/super/clang -DGRAPHICS_API_OPENGL_33 -DPLATFORM_DESKTOP -I/tmp/raylib-20180220-6462-ihgvj8/raylib-1.9.4-dev/src/external/glfw/include  -Werror=implicit-function-declaration -Werror=pointer-arith  -DNDEBUG -fPIC   -std=gnu99 -o CMakeFiles/raylib.dir/external/mini_al.c.o   -c /tmp/raylib-20180220-6462-ihgvj8/raylib-1.9.4-dev/src/external/mini_al.c
In file included from /tmp/raylib-20180220-6462-ihgvj8/raylib-1.9.4-dev/src/external/mini_al.c:4:
/tmp/raylib-20180220-6462-ihgvj8/raylib-1.9.4-dev/src/external/mini_al.h:2084:19: error: use of undeclared identifier 'CLOCK_MONOTONIC'
    clock_gettime(CLOCK_MONOTONIC, &newTime);
                  ^
/tmp/raylib-20180220-6462-ihgvj8/raylib-1.9.4-dev/src/external/mini_al.h:2092:19: error: use of undeclared identifier 'CLOCK_MONOTONIC'
    clock_gettime(CLOCK_MONOTONIC, &newTime);
                  ^
2 errors generated.

[raysan5]

Reviewed on commit 11612fc

Waiting for testing.

[a3f]

Builds and audio_module_playing works in both configurations (mach and POSIX clock API).

[raysan5]

That's great @a3f! I'm sending update to mini_al.