[mac] Fix cross-compilation for Android from a Mac

docs/building_with_gyp.md

Index: docs/building_with_gyp.md
diff --git a/docs/building_with_gyp.md b/docs/building_with_gyp.md
index 0183fd2de519f25779b9f63dab37b60cd6c3a397..d4534e45236329f398dd0c6173ba46780c57f189 100644
--- a/docs/building_with_gyp.md
+++ b/docs/building_with_gyp.md
@@ -157,6 +157,7 @@ Note: If you have configured your `GYP_GENERATORS` environment variable, either
 #### Custom build settings
 
 You can export the `GYP_DEFINES` environment variable in your shell to configure custom build options. The syntax is `GYP_DEFINES="-Dvariable1=value1 -Dvariable2=value2"` and so on for as many variables as you wish. Possibly interesting options include:
+
   * `-Dcomponent=shared_library` (see `library=shared` in the [GCC + make](#Optional_parameters.md) section above)
   * `-Dconsole=readline` (see `console=readline`)
   * `-Dv8_enable_disassembler=1` (see `disassembler=on`)
@@ -229,16 +230,19 @@ Building on MinGW is not officially supported, but it is possible. You even have
 #### Option 1: With Cygwin Installed
 
 Requirements:
+
   * MinGW
   * Cygwin, including Python
   * Python from www.python.org _(yes, you need two Python installations!)_
 
 Building:
+
   1. Open a MinGW shell
   1. `export PATH=$PATH:/c/cygwin/bin` _(or wherever you installed Cygwin)_
   1. `make ia32.release -j8`
 
 Running tests:
+
   1. Open a MinGW shell
   1. `export PATH=/c/Python27:$PATH` _(or wherever you installed Python)_
   1. `make ia32.release.check -j8`
@@ -246,10 +250,12 @@ Running tests:
 #### Option 2: Without Cygwin, just MinGW
 
 Requirements:
+
   * MinGW
   * Python from www.python.org
 
 Building and testing:
+
   1. Open a MinGW shell
   1. `tools/mingw-generate-makefiles.sh` _(re-run this any time a `*`.gyp`*` file changed, such as after updating your checkout)_
   1. `make ia32.release` _(unfortunately -jX doesn't seem to work here)_