devel/gobject-introspection fix

[Dominic Fandrey]

In order for the port to work with a CC that contains spaces (e.g.
"env CCACHE_PREFIX=/usr/local/bin/distcc /usr/local/bin/ccache cc"),

the line
@${REINPLACE_CMD} -e 's|'cc'|'${CC}'|g' \
needs to be changed to
@${REINPLACE_CMD} -e 's|'cc'|'${CC:Q}'|g' \

Also the port is not make -j safe, I suggest setting MAKE_JOBS_UNSAFE
in the ports Makefile.

Regards

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