flex: Patch Makefile.in instead of Makefile.am

[termux-packages] / packages / libxslt / xsltproc.subpackage.sh

TERMUX_SUBPKG_INCLUDE="bin/xsltproc share/man/man1/xsltproc.1"
TERMUX_SUBPKG_DESCRIPTION="XSLT command line processor"
TERMUX_SUBPKG_DEPENDS="libxslt"