stm32f1x_cl: Add initial support for STM32F1x connectivity line

This currently supports the stm32f107, but support will be added for
the F105 shortly (missing a linker script and I can't properly test
without a devkit).

cpu/arm/stm32f1x_cl/STM32F107VCT.ld

@@ -0,0 +1,54 @@
+MEMORY
+{
+  CODE (rx) : ORIGIN = 0x08000000, LENGTH = 256K
+  DATA (xrw) : ORIGIN = 0x20000000, LENGTH = 64K
+}
+
+/* Section Definitions */
+
+EXTERN (vector_table)
+ENTRY(reset_handler)
+SECTIONS
+{
+
+/* Make sure the vector table is at address 0 */
+
+   .text : {
+   	   *(.vectors)
+	   *(.text*)
+	   . = ALIGN(4);
+	   *(.rodata*)
+	   . = ALIGN(4);
+   } >CODE
+
+   . = ALIGN(4);
+   _etext = . ;
+   PROVIDE (etext = .);
+
+  .data :
+  {
+    _data = . ;
+    *(.data)
+    . = ALIGN(4);
+    _edata = . ;
+    PROVIDE (_edata = .);
+  } >DATA AT >CODE
+  _data_loadaddr = LOADADDR(.data);
+
+/* .bss section which is used for uninitialized data */
+
+  .bss :
+  {
+    __bss_start = . ;
+    __bss_start__ = . ;
+    *(.bss)
+    *(COMMON)
+    . = ALIGN(4);
+    _ebss = . ;
+  } >DATA
+  . = ALIGN(4);
+
+   _end = .;
+  PROVIDE (_end = .);
+}
+PROVIDE(_stack = ORIGIN(DATA) + LENGTH(DATA));