K 10
svn:author
V 3
dim
K 8
svn:date
V 27
2017-07-29T12:22:29.304178Z
K 7
svn:log
V 480
Don't use libc++ when cross-building for gcc arches

Since we imported clang 5.0.0, the version check in Makefile.inc1 which
checks whether to use libc++ fires even when the compiler for the target
architecture is gcc 4.2.1.  This is because only X_COMPILER_VERSION is
checked.  Also check X_COMPILER_TYPE, so it will only use libc++ when an
external gcc toolchain is used.

Reviewed by:	emaste, rpokala
MFC after:	3 days
Differential Revision: https://reviews.freebsd.org/D11776

END