Swap the GCC and Clang versions of supported FreeBSD mkspecs

Modern FreeBSD doesn't come with GCC by default anymore and doesn't even
provide the "gcc" or "g++" falback that OS X does. So there's no point
in keeping the freebsd-clang mkspec in unsupported/ since it's the only
one that works, or keeping the freebsd-g++* ones outside, as they won't
compile.

I'm not removing the GCC mkspecs because you can still install GCC from
the ports tree.

[ChangeLog][FreeBSD] The "freebsd-clang" mkspec is no longer in the
unsupported/ subdir. If you have scripts you use to build Qt, you'll need to
update them to say -platform freebsd-clang or remove the -platform argument.

Change-Id: I7a9e11d7b64a4cc78e24ffff142dfc11d3aabb1e
Reviewed-by: Raphael Kubo da Costa <rakuco@FreeBSD.org>
Reviewed-by: Simon Hausmann <simon.hausmann@theqtcompany.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>

configure

@@ -2854,7 +2854,7 @@ if [ -z "$PLATFORM" ]; then
         PLATFORM=ultrix-g++
         ;;
      FreeBSD:*)
-        PLATFORM=freebsd-g++
+        PLATFORM=freebsd-clang
         PLATFORM_NOTES="
             - Also available for FreeBSD: freebsd-icc
         "

mkspecs/freebsd-clang/qmake.conf

@@ -30,7 +30,7 @@ QMAKE_OBJCOPY           = objcopy
 QMAKE_NM                = nm -P
 QMAKE_RANLIB            =
 
-include(../../common/gcc-base-unix.conf)
-include(../../common/clang.conf)
+include(../common/gcc-base-unix.conf)
+include(../common/clang.conf)
 
 load(qt_config)

mkspecs/unsupported/freebsd-g++/qmake.conf

@@ -5,7 +5,7 @@
 MAKEFILE_GENERATOR      = UNIX
 QMAKE_PLATFORM          = freebsd bsd
 
-include(../common/unix.conf)
+include(../../common/unix.conf)
 
 QMAKE_CFLAGS_THREAD     = -pthread -D_THREAD_SAFE
 
@@ -29,6 +29,6 @@ QMAKE_OBJCOPY           = objcopy
 QMAKE_NM                = nm -P
 QMAKE_RANLIB            =
 
-include(../common/gcc-base-unix.conf)
-include(../common/g++-unix.conf)
+include(../../common/gcc-base-unix.conf)
+include(../../common/g++-unix.conf)
 load(qt_config)

mkspecs/unsupported/freebsd-g++/qplatformdefs.h

@@ -31,4 +31,4 @@
 **
 ****************************************************************************/
 
-#include "../../freebsd-g++/qplatformdefs.h"
+#include "../../freebsd-clang/qplatformdefs.h"

mkspecs/unsupported/freebsd-g++46/qmake.conf

@@ -5,7 +5,7 @@
 MAKEFILE_GENERATOR      = UNIX
 QMAKE_PLATFORM          = freebsd bsd
 
-include(../common/unix.conf)
+include(../../common/unix.conf)
 
 QMAKE_CFLAGS_THREAD     = -pthread -D_THREAD_SAFE
 
@@ -29,8 +29,8 @@ QMAKE_OBJCOPY           = objcopy
 QMAKE_NM                = nm -P
 QMAKE_RANLIB            =
 
-include(../common/gcc-base-unix.conf)
-include(../common/g++-unix.conf)
+include(../../common/gcc-base-unix.conf)
+include(../../common/g++-unix.conf)
 
 # Redefined here because g++-base.conf sets QMAKE_CC and QMAKE_CXX
 # to gcc and g++, respectively.

mkspecs/unsupported/freebsd-g++46/qplatformdefs.h

@@ -31,4 +31,4 @@
 **
 ****************************************************************************/
 
-#include "../freebsd-g++/qplatformdefs.h"
+#include "../../freebsd-clang/qplatformdefs.h"