Prefix export symbol prefix to coroutine_transfer

coroutine/arm32/Context.S

@@ -5,14 +5,17 @@
 ##  Copyright, 2018, by Samuel Williams.
 ##
 
+#define TOKEN_PASTE(x,y) x##y
+#define PREFIXED_SYMBOL(prefix,name) TOKEN_PASTE(prefix,name)
+
 .file "Context.S"
 .text
-.globl coroutine_transfer
+.globl PREFIXED_SYMBOL(SYMBOL_PREFIX,coroutine_transfer)
 .align 2
-.type coroutine_transfer,%function
+.type PREFIXED_SYMBOL(SYMBOL_PREFIX,coroutine_transfer),%function
 .syntax unified
 
-coroutine_transfer:
+PREFIXED_SYMBOL(SYMBOL_PREFIX,coroutine_transfer):
 	# Save caller state (8 registers + return address)
 	push {r4-r11,lr}
 

coroutine/arm64/Context.S

@@ -5,11 +5,14 @@
 ##  Copyright, 2018, by Samuel Williams.
 ##
 
+#define TOKEN_PASTE(x,y) x##y
+#define PREFIXED_SYMBOL(prefix,name) TOKEN_PASTE(prefix,name)
+
 .text
 .align 2
 
-.global coroutine_transfer
-coroutine_transfer:
+.global PREFIXED_SYMBOL(SYMBOL_PREFIX,coroutine_transfer)
+PREFIXED_SYMBOL(SYMBOL_PREFIX,coroutine_transfer):
 
 	# Make space on the stack for caller registers
 	sub sp, sp, 0xb0

coroutine/ppc64le/Context.S

@@ -1,9 +1,12 @@
+#define TOKEN_PASTE(x,y) x##y
+#define PREFIXED_SYMBOL(prefix,name) TOKEN_PASTE(prefix,name)
+
 .text
 .align 2
 
-.globl coroutine_transfer
-.type   coroutine_transfer, @function
-coroutine_transfer:
+.globl PREFIXED_SYMBOL(SYMBOL_PREFIX,coroutine_transfer)
+.type   PREFIXED_SYMBOL(SYMBOL_PREFIX,coroutine_transfer), @function
+PREFIXED_SYMBOL(SYMBOL_PREFIX,coroutine_transfer):
 	# Make space on the stack for caller registers
 	addi 1,1,-152