Rename jit linkage asm files (#836)

An extension of lower case s indicates to not run the
preprocessor while upper case S does. These files have defines.

src/ARMJIT_A64/ARMJIT_Linkage.S

@@ -0,0 +1,68 @@
+#include "../ARMJIT_x64/ARMJIT_Offsets.h"
+
+.text
+
+#define RCPSR w27
+#define RCycles w28
+#define RCPU x29
+
+.p2align 4,,15
+
+.global ARM_Dispatch
+ARM_Dispatch:
+    stp x19, x20, [sp, #-96]!
+    stp x21, x22, [sp, #16]
+    stp x23, x24, [sp, #32]
+    stp x25, x26, [sp, #48]
+    stp x27, x28, [sp, #64]
+    stp x29, x30, [sp, #80]
+
+    mov RCPU, x0
+    ldr RCycles, [RCPU, ARM_Cycles_offset]
+    ldr RCPSR, [RCPU, ARM_CPSR_offset]
+
+    br x1
+
+.p2align 4,,15
+
+.global ARM_Ret
+ARM_Ret:
+    str RCycles, [RCPU, ARM_Cycles_offset]
+    str RCPSR, [RCPU, ARM_CPSR_offset]
+
+    ldp x29, x30, [sp, #80]
+    ldp x27, x28, [sp, #64]
+    ldp x25, x26, [sp, #48]
+    ldp x23, x24, [sp, #32]
+    ldp x21, x22, [sp, #16]
+    ldp x19, x20, [sp], #96
+
+    ret
+
+.p2align 4,,15
+
+.global ARM_RestoreContext
+ARM_RestoreContext:
+    mov sp, x0
+
+    ldp x0, x1, [sp]
+    ldp x2, x3, [sp, #16]
+    ldp x4, x5, [sp, #32]
+    ldp x6, x7, [sp, #48]
+    ldp x8, x9, [sp, #64]
+    ldp x10, x11, [sp, #80]
+    ldp x12, x13, [sp, #96]
+    ldp x14, x15, [sp, #112]
+    ldp x16, x17, [sp, #128]
+    ldp x18, x19, [sp, #144]
+    ldp x20, x21, [sp, #160]
+    ldp x22, x23, [sp, #176]
+    ldp x24, x25, [sp, #192]
+    ldp x26, x27, [sp, #208]
+    ldp x28, x29, [sp, #224]
+    ldr x30, [sp, #240]
+
+    ldp x17, x18, [sp, #248]
+    mov sp, x17
+
+    br x18