[usp10] Add stubbed support for ScriptGetFontProperties - os -2

[Jesse Allen]

SCRIPT_CACHE not defined?

make[2]: Entering directory `/home/jesse/.local/build/wine/dlls/usp10'
gcc -c -I. -I. -I../../include -I../../include  -D__WINESRC__  
-D_REENTRANT -fPIC -Wall -pipe -mpreferred-stack-boundary=2
-fno-strict-aliasing -gstabs+ -Wpointer-arith  -g -O2 -o usp10.o
usp10.c
usp10.c:54: error: syntax error before "SCRIPT_CACHE"


Thanks,
Jesse