Refactor rel32 searching process for x64 to make it more similar to x86.

courgette/testdata/rel32_x64_01.txt

Index: courgette/testdata/rel32_x64_01.txt
diff --git a/courgette/testdata/rel32_win32_x86_01.txt b/courgette/testdata/rel32_x64_01.txt
similarity index 56%
copy from courgette/testdata/rel32_win32_x86_01.txt
copy to courgette/testdata/rel32_x64_01.txt
index 4234c86fcf07e466e9591f6fefb4886eea660a75..67155021212ed38a79ec52def8d335df782b0275 100644
--- a/courgette/testdata/rel32_win32_x86_01.txt
+++ b/courgette/testdata/rel32_x64_01.txt
@@ -31,8 +31,30 @@ Program:
   0040105B: 0F 8D 00 00 00 00  jge         00401061
   00401061: 0F 8E 00 00 00 00  jle         00401067
   00401067: 0F 8F 00 00 00 00  jg          0040106D
-  0040106D: 5D                 pop         ebp
-  0040106E: C3                 ret
+  0040106D: FF 15 00 00 00 00  call        00401073
+  00401073: FF 25 00 00 00 00  jmp         00401079
+  00401079: 8B 05 00 00 00 00  mov         eax, 00401079
+  0040107F: 8B 3D 00 00 00 00  mov         edi, 00401085
+  00401085: 8D 05 00 00 00 00  lea         eax, 00401079
+  0040108B: 8D 3D 00 00 00 00  lea         edi, 00401079
+  00401091: 48 8B 05 00 00 00  mov         rax, 00401098
+            00
+  00401098: 48 8B 3D 00 00 00  mov         rdi, 0040109F
+            00
+  0040109F: 48 8D 05 00 00 00  lea         rax, 004010A6
+            00
+  004010A6: 48 8D 3D 00 00 00  lea         rdi, 004010AD
+            00
+  004010AD: 4C 8B 05 00 00 00  mov         r8,  004010B4
+            00
+  004010B4: 4C 8B 3D 00 00 00  mov         r15, 004010BB
+            00
+  004010BB: 4C 8D 05 00 00 00  lea         r8,  004010C2
+            00
+  004010C2: 4C 8D 3D 00 00 00  lea         r15, 004010C9
+            00
+  004010C9: 5D                 pop         ebp
+  004010CA: C3                 ret
 
 Abs32:
 
@@ -53,3 +75,17 @@ Expected:
 105D
 1063
 1069
+106F
+1075
+#107B
+#1081
+#1087
+#108D
+1094
+109B
+10A2
+10A9
+10B0
+10B7
+10BE
+10C5