Fix CONFIG_TCC_SYSINCLUDEPATHS on !win32 systems
Fix CONFIG_TCC_SYSINCLUDEPATHS on !win32 systems

Commit 9382d6f1 ("Fix lib, include, crt and libgcc search paths",
07-09-2013) inadvertently included an initial empty entry to the
CONFIG_TCC_SYSINCLUDEPATHS variable (for non win32 targets). In
addition to an empty line in the 'tcc -vv' display, this leads
to the preprocessor attempting to read an include file from the
root of the filesystem (i.e. '/header.h').

Signed-off-by: Ramsay Jones <3e74413778ce9c8bebbbaedfd56741f6850faeaf@ramsay1.demon.co.uk>

alfonsokim/tinycc,rchandramouli/tinycc,seyko2/tinycc,rchandramouli/tinycc,mingodad/tinycc,run4flat/tinycc,leeduhem/tinycc,alfonsokim/tinycc,andrewchambers/tccmirror,metaeducation/tcc,avih/tinycc,avih/tinycc,seyko2/tinycc,rchandramouli/tinycc,metaeducation/tcc,avih/tinycc,mirror/tinycc,seyko2/tinycc,seyko2/tinycc,fstudio/tinycc,leeduhem/tinycc,seyko2/tinycc,Saectar/inherpreter,leeduhem/tinycc,code4game/tinycc,andrewchambers/tccmirror,Saectar/inherpreter,run4flat/tinycc,metaeducation/tcc,leeduhem/tinycc,code4game/tinycc,alfonsokim/tinycc,run4flat/tinycc,alfonsokim/tinycc,Saectar/inherpreter,andrewchambers/tccmirror,mirror/tinycc,Saectar/inherpreter,gfwilliams/tinycc,andreiw/tinycc,mingodad/tinycc,mingodad/tinycc,Saectar/inherpreter,andrewchambers/tccmirror,andreiw/tinycc,mirror/tinycc,andrewchambers/tccmirror,run4flat/tinycc,leeduhem/tinycc,code4game/tinycc,gfwilliams/tinycc,metaeducation/tcc,run4flat/tinycc,fstudio/tinycc,gfwilliams/tinycc,metaeducation/tcc,gfwilliams/tinycc,mingodad/tinycc,avih/tinycc,gfwilliams/tinycc,rchandramouli/tinycc,rchandramouli/tinycc,fstudio/tinycc,fstudio/tinycc,mirror/tinycc,andreiw/tinycc,alfonsokim/tinycc,fstudio/tinycc