stmhal: pyexec.c is common module, move to lib/utils/ .

esp8266/Makefile

@@ -68,7 +68,6 @@ SRC_C = \
 
 STM_SRC_C = $(addprefix stmhal/,\
 	printf.c \
-	pyexec.c \
 	pybstdio.c \
 	)
 
@@ -77,6 +76,7 @@ LIB_SRC_C = $(addprefix lib/,\
 	mp-readline/readline.c \
 	netutils/netutils.c \
 	timeutils/timeutils.c \
+	utils/pyexec.c \
 	)
 
 SRC_S = \

minimal/Makefile

@@ -45,7 +45,7 @@ SRC_C = \
 	uart_core.c \
 	uart_extra.c \
 	stmhal/printf.c \
-	stmhal/pyexec.c \
+	lib/utils/pyexec.c \
 	lib/libc/string0.c \
 	lib/mp-readline/readline.c \
 

pic16bit/Makefile

@@ -41,7 +41,7 @@ SRC_C = \
 	modpybled.c \
 	modpybswitch.c \
 	stmhal/pybstdio.c \
-	stmhal/pyexec.c \
+	lib/utils/pyexec.c \
 	lib/mp-readline/readline.c \
 
 SRC_S = \

stmhal/Makefile

@@ -103,6 +103,7 @@ SRC_LIB = $(addprefix lib/,\
 	mp-readline/readline.c \
 	netutils/netutils.c \
 	timeutils/timeutils.c \
+	utils/pyexec.c \
 	)
 
 SRC_C = \
@@ -132,7 +133,6 @@ SRC_C = \
 	printf.c \
 	gccollect.c \
 	pybstdio.c \
-	pyexec.c \
 	help.c \
 	input.c \
 	modmachine.c \

teensy/Makefile

@@ -99,7 +99,6 @@ STM_SRC_C = $(addprefix stmhal/,\
 	pin.c \
 	pin_named_pins.c \
 	printf.c \
-	pyexec.c \
 	pybstdio.c \
 	)
 
@@ -110,6 +109,7 @@ STM_SRC_S = $(addprefix stmhal/,\
 LIB_SRC_C = $(addprefix lib/,\
 	libc/string0.c \
 	mp-readline/readline.c \
+	utils/pyexec.c \
 	)
 
 SRC_TEENSY = $(addprefix core/,\