[mips32] pass linker script with an option that is understood by xc32
[mips32][PIC32-MAXI-WEB] more string stubs
[mips32][PIC32-MAXI-WEB][ld] correct length of memory regions
[mips32] define text sections in a way that xc32 can understand
[mips32] increase idle thread stack size to avoid overflow when built with -O1
[mips32][PIC32-MAXI-WEB] makefile and lscript for xc32
[mips32][PIC32-MAXI-WEB] merge xc32 and gcc ld scripts