Auto merge of #3539 - hdeller:hppa-devel3, r=JohnTitor

Add initial support for hppa-unknown-linux-gnu

This is the followup pull-request from:
#3032

Author: bors

src/unix/linux_like/linux/align.rs

@@ -88,6 +88,7 @@ macro_rules! expand_align {
                                target_arch = "mips32r6",
                                target_arch = "arm",
                                target_arch = "hexagon",
+                               target_arch = "hppa",
                                target_arch = "m68k",
                                target_arch = "csky",
                                target_arch = "powerpc",
@@ -100,6 +101,7 @@ macro_rules! expand_align {
                                    target_arch = "mips32r6",
                                    target_arch = "arm",
                                    target_arch = "hexagon",
+                                   target_arch = "hppa",
                                    target_arch = "m68k",
                                    target_arch = "csky",
                                    target_arch = "powerpc",
@@ -117,6 +119,7 @@ macro_rules! expand_align {
                                target_arch = "mips32r6",
                                target_arch = "arm",
                                target_arch = "hexagon",
+                               target_arch = "hppa",
                                target_arch = "m68k",
                                target_arch = "csky",
                                target_arch = "powerpc",
@@ -129,6 +132,7 @@ macro_rules! expand_align {
                                    target_arch = "mips32r6",
                                    target_arch = "arm",
                                    target_arch = "hexagon",
+                                   target_arch = "hppa",
                                    target_arch = "m68k",
                                    target_arch = "powerpc",
                                    target_arch = "sparc",

src/unix/linux_like/linux/gnu/b32/hppa/align.rs

@@ -0,0 +1,7 @@
+s_no_extra_traits! {
+    #[allow(missing_debug_implementations)]
+    #[repr(align(4))]
+    pub struct max_align_t {
+        priv_: [i8; 4]
+    }
+}