Merge pull request rust-embedded#573 from 9names/fix_stext_assert

cortex-m-rt: fix off-by-one in .text in FLASH section assert

Author: adamgreig

cortex-m-rt/link.x.in

@@ -266,7 +266,7 @@ ASSERT(ADDR(.vector_table) + SIZEOF(.vector_table) <= _stext, "
 ERROR(cortex-m-rt): The .text section can't be placed inside the .vector_table section
 Set _stext to an address greater than the end of .vector_table (See output of `nm`)");
 
-ASSERT(_stext > ORIGIN(FLASH) && _stext < ORIGIN(FLASH) + LENGTH(FLASH), "
+ASSERT(_stext >= ORIGIN(FLASH) && _stext < ORIGIN(FLASH) + LENGTH(FLASH), "
 ERROR(cortex-m-rt): The .text section must be placed inside the FLASH memory.
 Set _stext to an address within the FLASH region.");