Get Cosmopolitan into releasable state

A new rollup tool now exists for flattening out the headers in a way
that works better for our purposes than cpp. A lot of the API clutter
has been removed. APIs that aren't a sure thing in terms of general
recommendation are now marked internal.

There's now a smoke test for the amalgamation archive and gigantic
header file. So we can now guarantee you can use this project on the
easiest difficulty setting without the gigantic repository.

A website is being created, which is currently a work in progress:
https://justine.storage.googleapis.com/cosmopolitan/index.html

libc/nexgen32e/vendor.internal.h

@@ -0,0 +1,65 @@
+#ifndef COSMOPOLITAN_LIBC_NEXGEN32E_VENDOR_H_
+#define COSMOPOLITAN_LIBC_NEXGEN32E_VENDOR_H_
+#include "libc/nexgen32e/kcpuids.h"
+#if !(__ASSEMBLER__ + __LINKER__ + 0)
+
+/*
+ * Known 80x86 Vendors (CPUID.0 EBX+EDX+ECX)
+ *
+ *   ╤        ╤
+ *   GenuineIntel
+ *   AuthenticAMD
+ *   GenuineCosmo
+ *   NexGenDriven
+ *   AMDisbetter!
+ *   CentaurHauls
+ *   TransmetaCPU
+ *   GenuineTMx86
+ *   CyrixInstead
+ *   UMC UMC UMC
+ *   SiS SiS SiS
+ *   Geode by NSC
+ *   RiseRiseRise
+ *   Vortex86 SoC
+ *   VIA VIA VIA
+ *   VMwareVMware
+ *   XenVMMXenVMM
+ *   Microsoft Hv
+ *   └────┐   │
+ *        G ⊕ t = 0x33 Intel
+ *        A ⊕ A = 0x00 AMD
+ *        G ⊕ s = 0x34 Cosmopolitan
+ *        N ⊕ v = 0x38 NexGen (Modern x86)
+ *        A ⊕ e = 0x24 AMD (Rank & File)
+ *        C ⊕ u = 0x36 Via (DBA Centaur)
+ *        T ⊕ C = 0x17 Transmeta (Historical)
+ *        G ⊕ x = 0x3f Transmeta (Historical)
+ *        C ⊕ e = 0x26 Cyrix (Historical)
+ *        U ⊕ M = 0x18 UMC (Taiwan)
+ *        S ⊕ i = 0x3a SiS (Historical)
+ *        G ⊕ N = 0x09 National Semiconductors (OLPC)
+ *        R ⊕ i = 0x3b Rise Technology (Historical)
+ *        V ⊕ S = 0x05 DM&P (Vortex86)
+ *        V ⊕ I = 0x1f Via
+ *        V ⊕ a = 0x37 VMware
+ *        X ⊕ V = 0x0e Xen
+ *        M ⊕   = 0x6d Microsoft (Win10 Hyper-V)
+ *        │   │
+ *        │   │ perfect
+ *        │   │ 𝑕(𝑠)=𝑠₀⊕𝑠₉
+ *        ╧   ╧
+ *
+ * @note Parallels Desktop CPU brand string is " lrpepyh vr " since even
+ *       folks designing microprocessor emulators apparently struggle w/
+ *       endianness lool.
+ */
+#define IsAuthenticAMD() (_KCPUIDS_VENDOR() == 0x00)
+#define IsGenuineIntel() (_KCPUIDS_VENDOR() == 0x33)
+#define IsGenuineCosmo() (_KCPUIDS_VENDOR() == 0x34)
+
+#define _KCPUIDS_VENDOR()                               \
+  (((kCpuids[KCPUIDS_0H][KCPUIDS_EBX] >> 000) & 0xff) ^ \
+   ((kCpuids[KCPUIDS_0H][KCPUIDS_EDX] >> 010) & 0xff))
+
+#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
+#endif /* COSMOPOLITAN_LIBC_NEXGEN32E_VENDOR_H_ */