remove printf references, add bootloader script, merge hex files

targets/stm32l442/stm32l432xx.ld

@@ -41,7 +41,8 @@ _Min_Stack_Size = 0x400; /* required amount of stack */
 /* Specify the memory areas */
 MEMORY
 {
-FLASH (rx)      : ORIGIN = 0x08000000, LENGTH = 238K /* Leave out 18 Kb for data */
+/* First 32 KB is bootloader */ 
+FLASH (rx)      : ORIGIN = 0x08010000, LENGTH = 206K-8 /* Leave out 18 Kb at end for data */
 RAM (xrw)      : ORIGIN = 0x20000000, LENGTH = 48K
 SRAM2 (rw)      : ORIGIN = 0x10000000, LENGTH = 16K
 }