Wownero fails to compile on armv7a. To fix we can:

- update src/crypto/slow-hash.c to the latest version that Monero currently has
- modify variant4_random_math.h to facilitate the changes in slow-hash.c

In short; src/crypto/slow-hash.c is now up to date with upstream Monero.

The next Wownero version will have these changes automatically as the
codebase follows Monero, rendering this commit obsolete in the process.

src/crypto/variant4_random_math.h

@@ -11,7 +11,13 @@ enum V4_Settings
 	
 	// Always generate at least 60 instructions
 	NUM_INSTRUCTIONS = 60,
-	
+
+    // Always generate at least 60 instructions
+    NUM_INSTRUCTIONS_MIN = 60,
+
+    // Never generate more than 70 instructions (final RET instruction doesn't count here)
+    NUM_INSTRUCTIONS_MAX = 70,
+
 	// Available ALUs for MUL
 	// Modern CPUs typically have only 1 ALU which can do multiplications
 	ALU_COUNT_MUL = 1,