ProjectExplorer: Add support for new CR16 architecture

This commit adds new ProjectExplorer::Abi::CR16Architecture
entry for the National Semiconductor CR16 architecture:

 * https://en.wikipedia.org/wiki/CompactRISC

Change-Id: I886422e3745cbaec177236c3a2bd90950633a925
Reviewed-by: hjk <hjk@qt.io>

src/plugins/projectexplorer/abi.cpp

@@ -775,6 +775,8 @@ QString Abi::toString(const Architecture &a)
         return QLatin1String("m16c");
     case R32CArchitecture:
         return QLatin1String("r32c");
+    case CR16Architecture:
+        return QLatin1String("cr16");
     case RiscVArchitecture:
         return QLatin1String("riscv");
     case UnknownArchitecture:
@@ -941,6 +943,8 @@ Abi::Architecture Abi::architectureFromString(const QStringRef &a)
         return M16CArchitecture;
     if (a == "r32c")
         return R32CArchitecture;
+    if (a == "cr16")
+        return CR16Architecture;
     if (a == "riscv")
         return RiscVArchitecture;
     else if (a == "xtensa")

src/plugins/projectexplorer/abi.h

@@ -73,6 +73,7 @@ public:
         M32CArchitecture,
         M16CArchitecture,
         R32CArchitecture,
+        CR16Architecture,
         RiscVArchitecture,
         UnknownArchitecture
     };