add -j to the Haxe make commands

.travis.yml

@@ -100,7 +100,7 @@ install_linux: &install_linux
       cp -pr ~/_hxbuild ./_build;
     fi
   - test $TRAVIS_OS_NAME = 'osx' || make package_src -s
-  - opam config exec -- make -s STATICLINK=1
+  - opam config exec -- make -j -s STATICLINK=1
   - make package_bin -s
   - ls -l out
   - ldd -v ./haxe
@@ -158,7 +158,7 @@ install_osx: &install_osx
       cp -pr ~/_hxbuild ./_build;
     fi
   - make package_src -s
-  - make -s STATICLINK=1 "LIB_PARAMS=/usr/local/opt/zlib/lib/libz.a /usr/local/lib/libpcre.a"
+  - make -j -s STATICLINK=1 "LIB_PARAMS=/usr/local/opt/zlib/lib/libz.a /usr/local/lib/libpcre.a"
   - make package_bin -s
   - ls -l out
   - otool -L ./haxe

appveyor.yml

@@ -52,7 +52,7 @@ install:
 
 build_script:
     - 'cd %APPVEYOR_BUILD_FOLDER%'
-    - '%CYG_ROOT%/bin/bash -lc "cd \"$OLDPWD\" && make -s -f Makefile.win"'
+    - '%CYG_ROOT%/bin/bash -lc "cd \"$OLDPWD\" && make -j -s -f Makefile.win"'
     - 'set PATH=%PATH%;%APPVEYOR_BUILD_FOLDER%'
     - 'set HAXEPATH=%APPVEYOR_BUILD_FOLDER%'
     - '%CYG_ROOT%/bin/bash -lc "cd \"$OLDPWD\" && make -s -f Makefile.win package_bin"'