Fixing libiconv under Windows

Author: howetuft

conan-profiles/conan-profile-Windows-X64

@@ -18,6 +18,9 @@ doxygen/*:compiler.version=193
 tools.build:cxxflags=["/openmp", "/MP", "/DEBUG:NONE", "/O2", "/arch:AVX"]
 tools.build:cflags=["/openmp", "/MP", "/DEBUG:NONE", "/O2", "/arch:AVX"]
 embree3/*:tools.build:cxxflags=["/openmp", "/MP", "/DEBUG:NONE", "/O2"]
+libiconv/*:tools.microsoft.bash:path=C:\msys64\usr\bin\bash.exe
+libiconv/*:tools.microsoft.bash:subsystem=msys2
+libiconv/*:tools.build:compiler_executables={"CC":"gcc", "CXX":"gcc"}
 
 [options]
 # MSVC does not support avx2 nor avx512