[binutils-gdb/gdb-18-branch] Include <array> in ui-style.h

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=122643206a59e9c080266d88d119deb750c3da3e

commit 122643206a59e9c080266d88d119deb750c3da3e
Author: Nikita Venkatesh <[email protected]>
Date:   Wed Aug 26 16:32:56 2026 +0100

    Include <array> in ui-style.h
    
    ui-style.h uses std::array without including <array> directly.
    
    This builds successfully with GCC 8 and libstdc++ as its <tuple> header
    includes <array>. However, libc++'s <tuple> does not include <array> with
    Apple Clang 13.0.0. This causes the GDB builds to fail on macOS with:
    
            error: implicit instantiation of undefined template
            'std::array<unsigned char, 3>'
    
    Include <array> directly in ui-style.h rather than relying on the
    include from <tuple>.
    
    Approved-By: Andrew Burgess <[email protected]>
    (cherry picked from commit 625a5c311e6df32aa28214d017c65303bb5d6451)

Diff:
---
 gdb/ui-style.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/gdb/ui-style.h b/gdb/ui-style.h
index fc40b93709d..201a6f302d9 100644
--- a/gdb/ui-style.h
+++ b/gdb/ui-style.h
@@ -19,6 +19,8 @@
 #ifndef GDB_UI_STYLE_H
 #define GDB_UI_STYLE_H
 
+#include <array>
+
 /* One of the color spaces that usually supported by terminals.  */
 enum class color_space
 {