Added Daybreak, a system updater homebrew (#1073)

* Implemented a system updater homebrew (titled Daybreak)

* git subrepo pull ./troposphere/daybreak/nanovg

subrepo:
  subdir:   "troposphere/daybreak/nanovg"
  merged:   "c197ba2f"
upstream:
  origin:   "https://github.com/Adubbz/nanovg-deko.git"
  branch:   "master"
  commit:   "c197ba2f"
git-subrepo:
  version:  "0.4.1"
  origin:   "???"
  commit:   "???" (+1 squashed commits)

Squashed commits:

[232dc943] git subrepo clone https://github.com/Adubbz/nanovg-deko.git troposphere/daybreak/nanovg

subrepo:
  subdir:   "troposphere/daybreak/nanovg"
  merged:   "52bb784b"
upstream:
  origin:   "https://github.com/Adubbz/nanovg-deko.git"
  branch:   "master"
  commit:   "52bb784b"
git-subrepo:
  version:  "0.4.1"
  origin:   "???"
  commit:   "???"

* daybreak: switch to using hiddbg for home blocking (+1 squashed commits)

Squashed commits:

[4bfc7b0d] daybreak: block the home button during installation

troposphere/daybreak/nanovg/source/framework/CShader.cpp

@@ -0,0 +1,62 @@
+/*
+** Sample Framework for deko3d Applications
+**   CShader.cpp: Utility class for loading shaders from the filesystem
+*/
+#include "CShader.h"
+
+struct DkshHeader
+{
+    uint32_t magic; // DKSH_MAGIC
+    uint32_t header_sz; // sizeof(DkshHeader)
+    uint32_t control_sz;
+    uint32_t code_sz;
+    uint32_t programs_off;
+    uint32_t num_programs;
+};
+
+bool CShader::load(CMemPool& pool, const char* path)
+{
+    FILE* f;
+    DkshHeader hdr;
+    void* ctrlmem;
+
+    m_codemem.destroy();
+
+    f = fopen(path, "rb");
+    if (!f) return false;
+
+    if (!fread(&hdr, sizeof(hdr), 1, f))
+        goto _fail0;
+
+    ctrlmem = malloc(hdr.control_sz);
+    if (!ctrlmem)
+        goto _fail0;
+
+    rewind(f);
+    if (!fread(ctrlmem, hdr.control_sz, 1, f))
+        goto _fail1;
+
+    m_codemem = pool.allocate(hdr.code_sz, DK_SHADER_CODE_ALIGNMENT);
+    if (!m_codemem)
+        goto _fail1;
+
+    if (!fread(m_codemem.getCpuAddr(), hdr.code_sz, 1, f))
+        goto _fail2;
+
+    dk::ShaderMaker{m_codemem.getMemBlock(), m_codemem.getOffset()}
+        .setControl(ctrlmem)
+        .setProgramId(0)
+        .initialize(m_shader);
+
+    free(ctrlmem);
+    fclose(f);
+    return true;
+
+_fail2:
+    m_codemem.destroy();
+_fail1:
+    free(ctrlmem);
+_fail0:
+    fclose(f);
+    return false;
+}