MFH: r499101 r499116 r502628

Fix build when using GCC. Needed by GCC architectures.

Tested for no breakage on amd64 with Clang.

PR: 235921
Reviewed by: tcberner
Approved by: tcberner (mentor)

devel/qt5: Follow-up to r499101

• Move the GCC related path fix into freebsd-g++/qmake.conf Otherwise the inclusion of the GCC path would break clang based systems when gcc-${GCC_DEFAULT} was installed.

• This might break GCC architectures again, and if so, that will be fixed in a follow up commit.

PR: 235921

qt5: fix build on gcc architectures

• the sed call was only replacing one of the %%LOCALBASE%% by ${LOCALBASE}, due to the missing 'g' flag to the sed call.

• with this change the gcc architectures should be able to build Qt5 again.

PR: 237745
Submitted by: Mark Millard <marklmi26-fbsd@yahoo.com>, jwb
Reported by: pkubaj

Approved by: ports-secteam (joneum via irc)