PPC/s390: [base] Create base/strings.h

Port 9010201c

Original Commit Message:

    Moves VSNPrintf, SNPrintf and StrNCpy out of utils/utils.h into
    base/strings.h.

R=delphick@chromium.org, joransiu@ca.ibm.com, junyan@redhat.com, midawson@redhat.com
BUG=
LOG=N

Change-Id: Ia06003c1daea94e3767083b910bee1498bec37cd
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2979474Reviewed-by: Dan Elphick <delphick@chromium.org>
Commit-Queue: Dan Elphick <delphick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#75312}

src/diagnostics/ppc/disasm-ppc.cc

@@ -421,7 +421,7 @@ void Decoder::Unknown(Instruction* instr) { Format(instr, "unknown"); }
 // instruction bits.
 void Decoder::UnknownFormat(Instruction* instr, const char* name) {
   char buffer[100];
-  base::snprintf(buffer, sizeof(buffer), "%s (unknown-format)", name);
+  snprintf(buffer, sizeof(buffer), "%s (unknown-format)", name);
   Format(instr, buffer);
 }
 
@@ -1709,7 +1709,7 @@ int Decoder::InstructionDecode(byte* instr_ptr) {
 namespace disasm {
 
 const char* NameConverter::NameOfAddress(byte* addr) const {
-  v8::internal::base::SNPrintF(tmp_buffer_, "%p", static_cast<void*>(addr));
+  v8::base::SNPrintF(tmp_buffer_, "%p", static_cast<void*>(addr));
   return tmp_buffer_.begin();
 }
 

src/diagnostics/s390/disasm-s390.cc

@@ -1042,7 +1042,7 @@ int Decoder::InstructionDecode(byte* instr_ptr) {
 namespace disasm {
 
 const char* NameConverter::NameOfAddress(byte* addr) const {
-  v8::internal::base::SNPrintF(tmp_buffer_, "%p", static_cast<void*>(addr));
+  v8::base::SNPrintF(tmp_buffer_, "%p", static_cast<void*>(addr));
   return tmp_buffer_.begin();
 }