[arm] fix problem with gcc 4.4 to ensure the boot code is in the binary

seems that gcc 4.4 or the newer binutils likes to put linker generated
shims first in link order. Tweak the boot code to use a special section
that is ordered first by the linker script.

arch/arm/crt0.S

@@ -20,7 +20,7 @@
  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  */
-.text
+.section ".text.boot"
 .globl _start
 _start:
 	b	reset

arch/arm/system-onesegment.ld

@@ -6,6 +6,10 @@ SECTIONS
 {
 	. = %MEMBASE%;
 
+	/* text/read-only data */
+	.text.boot : { *(.text.boot) }
+	.text :	{ *(.text .text.* .glue_7* .gnu.linkonce.t.*) } =0x9090
+
 	.interp : { *(.interp) }
 	.hash : { *(.hash) }
 	.dynsym : { *(.dynsym) }
@@ -33,9 +37,6 @@ SECTIONS
 	.init : { *(.init) } =0x9090
 	.plt : { *(.plt) }
 
-	/* text/read-only data */
-	.text :	{ *(.text .text.* .glue_7* .gnu.linkonce.t.*) } =0x9090
-
 	.rodata : { 
 		*(.rodata .rodata.* .gnu.linkonce.r.*)
 		. = ALIGN(4);

arch/arm/system-twosegment.ld

@@ -6,6 +6,10 @@ SECTIONS
 {
 	. = %ROMBASE%;
 
+	/* text/read-only data */
+	.text.boot : { *(.text.boot) }
+	.text :	{ *(.text .text.* .glue_7* .gnu.linkonce.t.*) } =0x9090
+
 	.interp : { *(.interp) }
 	.hash : { *(.hash) }
 	.dynsym : { *(.dynsym) }
@@ -33,9 +37,6 @@ SECTIONS
 	.init : { *(.init) } =0x9090
 	.plt : { *(.plt) }
 
-	/* text/read-only data */
-	.text :	{ *(.text .text.* .glue_7* .gnu.linkonce.t.*) } =0x9090
-
 	.rodata : { 
 		*(.rodata .rodata.* .gnu.linkonce.r.*) 
 		. = ALIGN(4);