package/gcc: backport arm acle bugfix 81497

package/gcc: backport arm acle bugfix 81497

The compiler g++ reports an error when the header arm_acle.h is
included from version 7.

This patch backports the bugfix upstreamed [1] for gcc-7 and gcc-8.

Fixes:

	In file included from ../../include/QtCore/5.10.1/QtCore/private/../../../../../src/corelib/tools/qsimd_p.h:333,
	                 from ../../include/QtCore/5.10.1/QtCore/private/qsimd_p.h:1,
	                 from global/qlogging.cpp:58:
	/home/gportay/src/buildroot/output/host/lib/gcc/arm-buildroot-linux-gnueabihf/8.1.0/include/arm_acle.h: In function ‘void __arm_ldc(unsigned int, unsigned int, const void*)’:
	/home/gportay/src/buildroot/output/host/lib/gcc/arm-buildroot-linux-gnueabihf/8.1.0/include/arm_acle.h:48:46: error: invalid conversion from ‘const void*’ to ‘const int*’ [-fpermissive]
	   return __builtin_arm_ldc (__coproc, __CRd, __p);
                                              ^~~
	<built-in>: note:   initializing argument 3 of ‘void __builtin_arm_ldc(unsigned int, unsigned int, const int*)’
	...
	Makefile:196: recipe for target 'sub-corelib-make_first' failed
	make[3]: *** [sub-corelib-make_first] Error 2
	Makefile:48: recipe for target 'sub-src-make_first' failed
	make[2]: *** [sub-src-make_first] Error 2
	package/pkg-generic.mk:229: recipe for target '/home/gportay/src/buildroot/output/build/qt5base-5.10.1/.stamp_built' failed
	make[1]: *** [/home/gportay/src/buildroot/output/build/qt5base-5.10.1/.stamp_built] Error 2
	Makefile:16: recipe for target '_all' failed
	make: *** [_all] Error 2

[1]: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81497

Signed-off-by: Gaël PORTAY <gael.portay@savoirfairelinux.com>
Reviewed-by: Romain Naour <romain.naour@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>