tccpp: allow "0x1e+1" in asm
tccpp: allow "0x1e+1" in asm

run4flat/tinycc,avih/tinycc,mirror/tinycc,metaeducation/tcc,metaeducation/tcc,run4flat/tinycc,code4game/tinycc,mingodad/tinycc,code4game/tinycc,metaeducation/tcc,mirror/tinycc,andreiw/tinycc,mingodad/tinycc,mingodad/tinycc,run4flat/tinycc,metaeducation/tcc,andreiw/tinycc,andreiw/tinycc,code4game/tinycc,metaeducation/tcc,mirror/tinycc,run4flat/tinycc,avih/tinycc,mingodad/tinycc,avih/tinycc,run4flat/tinycc,mirror/tinycc,avih/tinycc