+ proper assembler command line parameters for arm thumb

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@23979 3ad0048d-3df7-0310-abae-a5850022a9f2
+ SVC instruction

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@23980 3ad0048d-3df7-0310-abae-a5850022a9f2
+ arm-linux startup code for thumb

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@23981 3ad0048d-3df7-0310-abae-a5850022a9f2
* armv6-m support for linux rtl Makefile

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@23982 3ad0048d-3df7-0310-abae-a5850022a9f2