Fix win7.patch empty line formatting

patches/boringssl/win7.patch

@@ -2,10 +2,10 @@
 +++ b/crypto/rand/windows.cc
 @@ -24,6 +24,7 @@
  #include <stdlib.h>
-
+ 
  #include <windows.h>
 +#include <wincrypt.h>
-
+ 
  #if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP) && \
      !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
 @@ -57,16 +58,40 @@
@@ -18,7 +18,7 @@
 +{
 +  return CryptGenRandom(g_hCryptProv, cbData, pbData);
 +}
-
+ 
  static void init_processprng(void) {
    HMODULE hmod = LoadLibraryW(L"bcryptprimitives");
 -  if (hmod == nullptr) {
@@ -53,5 +53,5 @@
 +
 +  abort();
  }
-
+ 
  void CRYPTO_init_sysrand(void) {