[nnyeah] Add tool to be made via makefiles. (#14513)

Adding the needed Makefile and the dir to the parent one so that the
tool is also built in the CI.


Co-authored-by: Rolf Bjarne Kvinge <rolf@xamarin.com>

tools/Makefile

@@ -6,7 +6,7 @@ ifdef INCLUDE_MAC
 SUBDIRS+=mmp
 endif
 
-SUBDIRS+=mtouch xibuild mlaunch siminstaller
+SUBDIRS+=mtouch xibuild mlaunch siminstaller nnyeah
 
 ifdef ENABLE_INSTALL_SOURCE
 SUBDIRS += install-source

tools/nnyeah/Makefile

@@ -0,0 +1,12 @@
+TOP=../..
+include $(TOP)/Make.config
+
+all-local:: bin/Debug/net5.0/nnyeah.dll
+
+install-local:: all-local
+
+bin/Debug/net5.0/nnyeah.dll: $(wildcard **/*.cs) $(wildcard **/*.csproj) $(wildcard *.sln) Makefile
+	$(Q_BUILD) $(SYSTEM_DOTNET) build "/bl:$@.binlog" /restore $(MSBUILD_VERBOSITY) $(wildcard *.sln)
+
+clean:
+	$(Q_BUILD) $(SYSTEM_DOTNET) build "/bl:$@.binlog" /restore $(MSBUILD_VERBOSITY) /t:Clean $(wildcard *.sln)