* src/configure.in: check for endianess (even while cross-compiling)

* src/configure.in:   check for endianess (even while cross-compiling)
* src/configure:      check for endianess (even while cross-compiling)
* src/configure_in.h: check for endianess (even while cross-compiling)
* src/avr/gen.c:        remove old endianess stuff
* src/mcs51/gen.c:      remove old endianess stuff
* src/ds390/gen.c:      remove old endianess stuff
* src/pic/gen.c:        remove old endianess stuff
* src/pic/genarith.c:   remove old endianess stuff
* src/pic/glue.c:       fix endianess check
* src/pic16/gen.c:      remove old endianess stuff
* src/pic16/genarith.c: remove old endianess stuff
* src/pic16/glue.c:     fix endianess check
* src/xa51/gen.c:       remove old endianess stuff
* src/z80/gen.c:        fix endianess check
* src/SDCCglue.c:       fix endianess check

git-svn-id: https://sdcc.svn.sourceforge.net/svnroot/sdcc/trunk/sdcc@2346 4a8a32a2-be11-0410-ad9d-d568d2c75423