[Linux] miphoneos-version-min and target version are stuck at 10.0

[L1ghtmann]

No matter what the target version is set to in the makefile, Dragon seems to always build for 10.0+.

-miphoneos-version-min=10.0 
-target arm64-apple-ios10.0

Occurs with a standard Unix makefile ~~and with a DragonMake file with targetvers: set~~.

[L1ghtmann]

Also, somewhat related, I don't think you need the miphoneos-version-min flag with the ios<version> triple. otool shows it being set to whatever version the target flag specifies in the absence of the miphoneos-version-min flag.