Silence FPC's below-esp warning in the SHA-256 i386 kernels

FPC flags "lea esp, [esp - $60]" with "Use of -offset(%esp), access
may cause a crash or value may be lost" in the SSE2/SSSE3/AVX SHA-256
i386 kernels. The warning is a false positive - lea is address
arithmetic, not a memory access; the line is the CRYPTOGAMS
flag-neutral spelling of a stack allocation and nothing ever
dereferences below esp. Spelled it "sub esp, $60" instead: no flag
consumer lives between the allocation and the next flag-setting
instruction at any of the three sites, so the forms are equivalent -
and the recurring build noise is gone.

Author: Xor-el

HashLib/src/Include/Simd/SHA256/SHA256CompressAvx_i386.inc

@@ -28,7 +28,7 @@
   mov    dword ptr [esp + $4], edi
   mov    dword ptr [esp + $8], eax
   mov    dword ptr [esp + $C], ebx
-  lea    esp, [esp - $60]
+  sub    esp, $60
   db $C5, $FC, $77                                // vzeroall
   mov    eax, dword ptr [esi]
   mov    ebx, dword ptr [esi + $4]

HashLib/src/Include/Simd/SHA256/SHA256CompressSse2_i386.inc

@@ -26,7 +26,7 @@
   mov    dword [esp + $4], edi
   mov    dword [esp + $8], eax
   mov    dword [esp + $C], ebx
-  lea    esp, [esp - $60]
+  sub    esp, $60
   mov    eax, dword [esi]
   mov    ebx, dword [esi + $4]
   mov    ecx, dword [esi + $8]

HashLib/src/Include/Simd/SHA256/SHA256CompressSsse3_i386.inc

@@ -28,7 +28,7 @@
   mov    dword [esp + $4], edi
   mov    dword [esp + $8], eax
   mov    dword [esp + $C], ebx
-  lea    esp, [esp - $60]
+  sub    esp, $60
   mov    eax, dword [esi]
   mov    ebx, dword [esi + $4]
   mov    ecx, dword [esi + $8]