Fixed HAL auto-detection order

Because MinGW was not recognized as Windows during cross-builds.

mrbgems/mruby-dir/mrbgem.rake

@@ -11,10 +11,10 @@ MRuby::Gem::Specification.new('mruby-dir') do |spec|
     elsif spec.build.primary_toolchain == 'visualcpp'
       # Visual C++ on Windows - use native Windows HAL
       'hal-win-dir'
-    elsif RUBY_PLATFORM =~ /linux|darwin|bsd/
-      'hal-posix-dir'
     elsif spec.for_windows?
       'hal-win-dir'
+    elsif RUBY_PLATFORM =~ /linux|darwin|bsd/
+      'hal-posix-dir'
     else
       nil
     end

mrbgems/mruby-io/mrbgem.rake

@@ -13,10 +13,10 @@ MRuby::Gem::Specification.new('mruby-io') do |spec|
     suggested_hal = if spec.build.primary_toolchain == 'visualcpp'
       # Visual C++ on Windows - use native Windows HAL
       'hal-win-io'
-    elsif RUBY_PLATFORM =~ /linux|darwin|bsd/
-      'hal-posix-io'
     elsif spec.for_windows?
       'hal-win-io'
+    elsif RUBY_PLATFORM =~ /linux|darwin|bsd/
+      'hal-posix-io'
     else
       nil
     end

mrbgems/mruby-socket/mrbgem.rake

@@ -16,10 +16,10 @@ MRuby::Gem::Specification.new('mruby-socket') do |spec|
     suggested_hal = if spec.build.primary_toolchain == 'visualcpp'
       # Visual C++ on Windows - use native Windows HAL
       'hal-win-socket'
-    elsif RUBY_PLATFORM =~ /linux|darwin|bsd/
-      'hal-posix-socket'
     elsif spec.for_windows?
       'hal-win-socket'
+    elsif RUBY_PLATFORM =~ /linux|darwin|bsd/
+      'hal-posix-socket'
     else
       nil
     end

mrbgems/mruby-task/mrbgem.rake

@@ -18,10 +18,10 @@ MRuby::Gem::Specification.new('mruby-task') do |spec|
           RUBY_PLATFORM =~ /mingw/
       # MinGW provides POSIX I/O but NOT POSIX signals - use Windows HAL
       'hal-win-task'
-    elsif RUBY_PLATFORM =~ /linux|darwin|bsd/
-      'hal-posix-task'
     elsif spec.for_windows?
       'hal-win-task'
+    elsif RUBY_PLATFORM =~ /linux|darwin|bsd/
+      'hal-posix-task'
     else
       nil
     end