znc: Strip out DEBUG_PREFIX_MAP options and --sysroot from znc.pc
znc: Strip out DEBUG_PREFIX_MAP options and --sysroot from znc.pc

This fixes issues e.g.
ERROR: znc-1.7.1-r0 do_populate_sysroot: QA Issue: znc.pc failed sanity test (tmpdir) in path /mnt/a/yoe/build/tmp/work/aarch64-yoe-linux/znc/1.7.1-r0/sysroot-destdir/usr/lib/pkgconfig [pkgconfig]
ERROR: znc-1.7.1-r0 do_populate_sysroot: QA staging was broken by the package built above

Signed-off-by: Khem Raj <729d64b6f67515e258459a5f6d20ec88b2caf8df@gmail.com>

openembedded/meta-openembedded,VCTLabs/meta-openembedded,victronenergy/meta-openembedded,moto-timo/meta-openembedded,moto-timo/meta-openembedded,mrchapp/meta-openembedded,openembedded/meta-openembedded,mrchapp/meta-openembedded,rehsack/meta-openembedded,victronenergy/meta-openembedded,rehsack/meta-openembedded,openembedded/meta-openembedded,mrchapp/meta-openembedded,schnitzeltony/meta-openembedded,schnitzeltony/meta-openembedded,schnitzeltony/meta-openembedded,victronenergy/meta-openembedded,moto-timo/meta-openembedded,openembedded/meta-openembedded,rehsack/meta-openembedded,victronenergy/meta-openembedded,openembedded/meta-openembedded,rehsack/meta-openembedded,VCTLabs/meta-openembedded,moto-timo/meta-openembedded,mrchapp/meta-openembedded,victronenergy/meta-openembedded,schnitzeltony/meta-openembedded,rehsack/meta-openembedded,lgirdk/meta-openembedded,mrchapp/meta-openembedded,victronenergy/meta-openembedded,lgirdk/meta-openembedded,schnitzeltony/meta-openembedded,openembedded/meta-openembedded,mrchapp/meta-openembedded,VCTLabs/meta-openembedded,rehsack/meta-openembedded,rehsack/meta-openembedded,lgirdk/meta-openembedded,schnitzeltony/meta-openembedded,VCTLabs/meta-openembedded,VCTLabs/meta-openembedded,lgirdk/meta-openembedded,VCTLabs/meta-openembedded,VCTLabs/meta-openembedded,schnitzeltony/meta-openembedded,lgirdk/meta-openembedded,openembedded/meta-openembedded,mrchapp/meta-openembedded,moto-timo/meta-openembedded,victronenergy/meta-openembedded,lgirdk/meta-openembedded,lgirdk/meta-openembedded,VCTLabs/meta-openembedded,openembedded/meta-openembedded