TEST: port PDM buffer patch to build script

arduino/mbed-os#13

Author: facchinm

mbed-os-to-arduino

@@ -180,9 +180,13 @@ generate_flags () {
 				OPENAMP_SECTION=".openamp_section (NOLOAD) : {\n \
         . = ABSOLUTE(0x38000000);\n \
         *(.resource_table)\n \
-    } >RAM_D3  AT > FLASH"
+    } >RAM_D3  AT > FLASH\n \
+    .pdm_section (NOLOAD) : {\n \
+        . = ABSOLUTE(0x3800FC00);\n \
+        *(.pdm_buffer)\n \
+    } > RAM_D3"
 				sed -i "s?.heap (COPY):?${OPENAMP_SECTION}\n    .heap (COPY):?g" $ARDUINOVARIANT/linker_script.ld
-				OPENAMP_REGIONS="__OPENAMP_region_start__  = 0x38000400;\n__OPENAMP_region_end__ = 0x38000400 + LENGTH(RAM_D3);"
+				OPENAMP_REGIONS="__OPENAMP_region_start__  = 0x38000400;\n__OPENAMP_region_end__ = 0x38000400 + LENGTH(RAM_D3) - 1K;"
 				sed -i "s?ENTRY(Reset_Handler)?${OPENAMP_REGIONS}\nENTRY(Reset_Handler)?g" $ARDUINOVARIANT/linker_script.ld
 			fi
 		fi