Revert "qt5: build with -fpermissive"

This reverts commit a863bb4.

no longer required with OpenSSL 4.x

Author: heitbaum

packages/addons/addon-depends/qt5/package.mk

@@ -128,7 +128,7 @@ QMAKE_OBJCOPY    = ${OBJCOPY}
 QMAKE_NM         = ${NM} -P
 QMAKE_STRIP      = ${STRIP}
 QMAKE_CFLAGS     = ${CFLAGS}
-QMAKE_CXXFLAGS   = ${CXXFLAGS} -fpermissive
+QMAKE_CXXFLAGS   = ${CXXFLAGS}
 QMAKE_LFLAGS     = ${LDFLAGS}
 load(qt_config)
 EOF