Add contants RTLD contants on os_linux and posix (dlfcn).

core/os/os_linux.odin

@@ -242,10 +242,13 @@ F_SETFL: int : 4 /* Set file flags */
 
 // NOTE(zangent): These are OS specific!
 // Do not mix these up!
-RTLD_LAZY         :: 0x001
+RTLD_LAZY         :: 0x0001
-RTLD_NOW          :: 0x002
+RTLD_NOW          :: 0x0002
-RTLD_BINDING_MASK :: 0x3
+RTLD_BINDING_MASK :: 0x0003
-RTLD_GLOBAL       :: 0x100
+RTLD_GLOBAL       :: 0x0100
+RTLD_NOLOAD       :: 0x0004
+RTLD_DEEPBIND     :: 0x0008
+RTLD_NODELETE     :: 0x1000
 
 socklen_t :: c.int
 

core/sys/posix/dlfcn.odin

@@ -111,6 +111,15 @@ when ODIN_OS == .Darwin {
 
 	RTLD_LOCAL   :: RTLD_Flags{RTLD_Flag_Bits(log2(_RTLD_LOCAL))}
 
+} else when ODIN_OS == .Linux {
+
+	RTLD_LAZY    :: 0x001
+	RTLD_NOW     :: 0x002
+	RTLD_GLOBAL  :: 0x100
+
+	_RTLD_LOCAL  :: 0
+	RTLD_LOCAL   :: RTLD_Flags{}
+
 } else {
 	#panic("posix is unimplemented for the current target")
 }