Commit message longer than commit edition.
Simulator and devices:
Add a common minimum iOS version that can be shared by iOS and iOS
simulator targets.
Fix --enable-debug (for device targets; sim was fine):
Allow for successful configuration and build with --enable-debug when
CXX is available by:
- Using CXX as LD (when CXX is available).
- Passing the correct form of the iOS minimum version parameter based on
whether LD is CXX or really is ld.
Note: ld -g still won't work on macosx with this patch, so if CXX is not
available, configuration will still fail reporting that the toolchain
cannot link executables when attempting to pass --enable-debug (because
ld returns an error code since the one included with xcode doesn't
support the -g argument).
Change-Id: Ia488aed167cc2ca82ee9e980589fb76dddce634f
bd2a9bdd66