emulators/lisaem: Fix build with Clang 6

lisaem_static_resources.cpp:672:1: error: constant expression evaluates to 3735928559 which cannot be narrowed to type 'long' [-Wc++11-narrowing]
0xdeadbeef
^~~~~~~~~

http://beefy11.nyi.freebsd.org/data/head-i386-default/p478276_s338342/logs/errors/lisaem-1.2.6.2.log

• Move build script patches to a static patch file and fix it to respect CXXFLAGS, CFLAGS, LDFLAGS set by the framework